CN202094840U - Novel rotor chopping speed regulating system of hoisting wound motor - Google Patents
Novel rotor chopping speed regulating system of hoisting wound motor Download PDFInfo
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- CN202094840U CN202094840U CN2011201111592U CN201120111159U CN202094840U CN 202094840 U CN202094840 U CN 202094840U CN 2011201111592 U CN2011201111592 U CN 2011201111592U CN 201120111159 U CN201120111159 U CN 201120111159U CN 202094840 U CN202094840 U CN 202094840U
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- igbt
- bipolar transistor
- insulated gate
- gate bipolar
- contactor
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Abstract
The utility model relates to a novel rotor chopping speed regulating system of a hoisting wound motor. A circuit at a motor stator side comprises a transformer connected with two phases of alternating current voltage in three phases of alternating current voltage, a single-phase alternating current contactor connected with the primary side of the transformer and a single-phase rectifier bridge connected with the secondary side of the transformer; a circuit at a motor rotor side comprises a three-phase rectifier bridge connected with the three phases of alternating current voltage, a first insulated gate bipolar transistor, a second insulated gate bipolar transistor, a diode, a filter capacitance and a fixed speed regulating resistance; the first insulated gate bipolar transistor and the second insulated gate bipolar transistor are connected in series and then are connected with two ends of the three-phase rectifier bridge; the diode is connected with the fixed speed regulating resistance in series and then is connected with the first insulated gate bipolar transistor in parallel; and one end of the filter capacitance is connected with the cathode of the diode, and the other end of the filter capacitance is connected with an emitter of the second insulated gate bipolar transistor. The novel rotor chopping speed regulating system for the hoisting wound motor not only keeps the advantages of the original rotor loop serial resistance speed regulating and single-pipe rotor chopping speed regulating, but also overcomes the defects of low speed incapacity without light load, and large loss under heavy load.
Description
Technical field
The utility model relates to the lifting winding motors, particularly a kind of novel lifting winding motors rotor chopping regulating speed system.
Background technology
The lifting dragging motor major part of the domestic use of China is still wire-wound asynchronous motor at present, and its most traditional mode of speed regulation is exactly rotor loop string graded resistance open loop speed governing.Its main circuit is made of wire wound asynchronous motor, resistance box, A.C. contactor group, by the switching of connecting and disconnecting controlling resistance of control A.C. contactor, regulates motor speed.Advantages such as this governing system has that starting performance is good, power factor is high, control method is simple, be easy to realize and initial investment is few.Yet this method exists important disadvantages, and mechanical property is soft when mainly containing low speed, the static difference rate is big, speed adjustable range is restricted, owing to be step speed regulation, progression is limited, and the speed governing flatness is poor, and is bigger to load shock when resistance switches; The control of employing contactor, bulky, failure rate height, troublesome maintenance.
Along with the development of power electronic technology, the mode of speed regulation of lifting winding motors has had to be improved, and the rotor chopping regulating speed is exactly wherein a kind of.Its main circuit is by wire wound asynchronous motor, three phase rectifier module, copped wave pipe and buffer circuit thereof, fixedly speed adjusting resistance, A.C. contactor group constitute.It will originally be regulated by three-phase commutation bridge and copped wave pipe by the rotor outer meeting resistance of hand-guided, thereby realized the step-less adjustment to fixed resistance, realized the step-less adjustment of rotor rotating speed.The existing at present system that adopts the thyristor chopping regulating speed and adopt igbt (Insulated Gate Bipolar Transistor is called for short IGBT) chopping regulating speed.This speed-regulating scheme is easy to realize closed-loop control, control precision height when general load, stationarity is good, device volume is little, small investment, but is difficult to realize the low speed requirement when underloading, and energy loss was big when heavy duty was transferred, and can not realize energy-conservation requirement.
The utility model content
Can not realize that in order to overcome existing rotor chopping regulating speed system underloading low speed and heavy duty transfer problem of energy saving, the utility model provides a kind of novel lifting winding motors rotor chopping regulating speed system, the advantage that had both kept original rotor loop serial-resistance speed-regulation and single tube rotor chopping regulating speed, having overcome underloading again can not low speed, the big shortcoming of loss is transferred in heavy duty.
The technical solution of the utility model: a kind of novel lifting winding motors rotor chopping regulating speed system, comprise motor stator lateral circuit and motor rotor lateral circuit,
Comprise in the motor stator lateral circuit: the transformer, a single phase alternating current (A.C.) contactor that is connected to this former limit of transformer and the single-phase rectification bridge that is connected to this transformer secondary that are connected to the wherein two-phase alternating current pressure of three-phase alternating voltage;
Comprise in the motor rotor lateral circuit: be connected to the three-phase commutation bridge, first igbt, second igbt, diode, filter capacitor of three-phase alternating voltage and fixing speed adjusting resistance, be connected to the two ends of this three-phase commutation bridge after first igbt and the series connection of second igbt, the diode back of connecting with fixing speed adjusting resistance is in parallel with first igbt, one end of filter capacitor is connected with the negative electrode of diode, and the other end is connected with the emitter of second igbt.
In the utility model, realize the motor rotor chopping regulating speed by equivalent resistance to the duty ratio control break rotor loop of first igbt, second igbt.
In the utility model, also comprise the A.C. contactor that a plurality of wherein two-phase alternating currents that are connected to three-phase alternating voltage are pressed.
The utility model also discloses a kind of novel lifting winding motors rotor chopping regulating speed method simultaneously,
A, when load was standard termination, it comprised the treatment step that promotes load and transfer load;
B, when load was underloading, it comprised the treatment step that promotes load and transfer load;
C, when load is heavy duty when transferring, it comprises the treatment step that heavy duty is transferred.
In the utility model, steps A specifically comprises:
The step that promotes load comprises:
A1, threephase stator feed the positive phase sequence three-phase electricity, and machine operation is in the forward motoring condition, the first A.C. contactor closure, and second A.C. contactor, the 3rd A.C. contactor disconnect;
A2, the first igbt copped wave, the second igbt conducting, the duty ratio of regulating first igbt realizes speed governing;
A3, if require at full speed, then with the 4th A.C. contactor closure, first igbt, second igbt turn-off;
The step of transferring load comprises:
B1, threephase stator feeds the positive phase sequence three-phase electricity, and machine operation is in drawing inverted status, the first A.C. contactor closure, second A.C. contactor, the disconnection of the 3rd A.C. contactor;
B2, first igbt turn-offs, the second igbt copped wave, the duty ratio of regulating second igbt realizes speed governing.
In the utility model, among the step a2,
If the duty ratio of first igbt is zero shutoff, carry out the transition to the duty ratio of regulating second igbt, realize that low speed promotes speed governing.
In the utility model, step B specifically comprises:
The step that promotes load comprises above-mentioned steps a1, step a2 and step a3;
The step of transferring load comprises:
C1, execution in step b1, b2 if the duty ratio of second igbt is zero, then can not transfers load and enter step c2;
C2, threephase stator feed the negative-phase sequence three-phase electricity, and machine operation is in reverse motoring condition, the second A.C. contactor closure, and first A.C. contactor, the 3rd A.C. contactor disconnect; And
C3, the first igbt copped wave, the second igbt conducting, the duty ratio of regulating first igbt realizes speed governing.
In the utility model, when load is heavy duty when transferring, it adopts the not dynamic braking operational mode of electric consumption power, and step C specifically comprises:
D1, the 3rd A.C. contactor closure, first A.C. contactor, second A.C. contactor disconnect;
D2, the first igbt copped wave, the second igbt conducting, the duty ratio of regulating first igbt realizes speed governing;
D3, if require lowest speed, the 4th A.C. contactor closure then, first igbt, second igbt turn-off.
In the utility model, in the steps d 2,
If the duty ratio of first igbt is zero shutoff, carry out the transition to the duty ratio of regulating second igbt.
In the utility model,
If require energy-conservation full speed to transfer, threephase stator feeds the negative-phase sequence three-phase electricity, and machine operation is in reverse feedback generating state, the second A.C. contactor closure, and first A.C. contactor disconnects, the 3rd A.C. contactor disconnects the 4th A.C. contactor closure.
The beneficial effect that the utlity model has: adopt novel lifting winding motors rotor chopping regulating speed described in the utility model system, the advantage that has kept original rotor loop serial-resistance speed-regulation and single tube rotor chopping regulating speed, having overcome underloading again can not low speed, the big shortcoming of loss is transferred in heavy duty.
Description of drawings
Fig. 1 is two igbt (IGBT) the chopping regulating speed circuit diagrams of the utility model;
Fig. 2 is the mechanical characteristic figure of the utility model asynchronous machine.
Embodiment
Further understand and understanding for making architectural feature of the present utility model and the effect reached had, cooperate detailed explanation, be described as follows in order to preferred embodiment and accompanying drawing:
Fig. 1 is two igbt (IGBT) the chopping regulating speed circuit diagrams of the utility model, as shown in the figure.Among the figure, AC is a three-phase alternating voltage, and KM1～4 are first～the 4th A.C. contactor, and T is a step-down transformer, and DC is a direct voltage after the single-phase rectifier, and D is a diode, and C is a filter capacitor, and Rex is fixing speed adjusting resistance.The rotor chopping regulating speed is exactly by the equivalent resistance to duty ratio (PWM) the control break rotor loop of copped wave pipe, make machine operation on different mechanical characteristics, the mechanical characteristic of asynchronous machine as shown in Figure 2, a is the forward electric operation, and b is reverse electric operation, and c is reverse regenerative braking operation, d is for drawing the counter-rotating operation, e is the forward electric operation, and f is the dynamic braking operation, and g is forward regenerative braking operation.
Novel lifting winding motors rotor chopping regulating speed described in the utility model system mainly comprises motor stator lateral circuit and motor rotor lateral circuit.
Comprise in the motor stator lateral circuit: be connected to transformer T, single-phase the 3rd A.C. contactor KM3 who is connected to the former limit of this transformer T that the wherein two-phase alternating current of three-phase alternating voltage AC presses and the single-phase rectification bridge S1 that is connected to this transformer T secondary.That is to say any two phase voltages of stator are not controlled rectification through single-phase rectification bridge S1 again that after transformer T step-down the direct voltage of rectification output is added on the two same phase voltages.
Comprise in the motor rotor lateral circuit: the three-phase commutation bridge S2 that is connected to three-phase alternating voltage AC, first insulated gate bipolar transistor IGBT 1, second insulated gate bipolar transistor IGBT 2, diode D, filter capacitor C and fixing speed adjusting resistance Rex, be connected to the two ends of three-phase commutation bridge S2 after first insulated gate bipolar transistor IGBT 1 and 2 series connection of second insulated gate bipolar transistor IGBT, the diode D back of connecting with fixing speed adjusting resistance Rex is in parallel with first insulated gate bipolar transistor IGBT 1, the end of filter capacitor C is connected with the negative electrode of diode D, and the other end is connected with the emitter of second insulated gate bipolar transistor IGBT 2.
During underloading, first insulated gate bipolar transistor IGBT 1 turn-offs, and 2 copped waves of second insulated gate bipolar transistor IGBT realize low speed; When heavy duty is transferred, feed above-mentioned direct voltage for the motor stator side, the duty ratio according to rotating speed requirement control first insulated gate bipolar transistor IGBT 1 and second insulated gate bipolar transistor IGBT 2 realizes speed governing.
Wherein, two igbts (IGBT) chopping regulating speed circuit diagram shown in Figure 1 also comprises the A.C. contactor that a plurality of wherein two-phase alternating currents that are connected to three-phase alternating voltage are pressed, the for example first A.C. contactor KM1, the second A.C. contactor KM2 and the 4th A.C. contactor KM4.
The mechanical characteristic figure of Fig. 2 asynchronous machine, mainly by the load decision, therefore, according to the variation of load, the working method of main circuit is as follows for the working method of main circuit:
1, general load lifting and lifting heavy duty
Promote load: threephase stator feeds the positive phase sequence three-phase electricity, and machine operation is in the forward motoring condition, the first A.C. contactor KM1 closure, and the second A.C. contactor KM2, the 3rd A.C. contactor KM3 disconnect; 1 copped wave of first insulated gate bipolar transistor IGBT, 2 conductings of second insulated gate bipolar transistor IGBT, the duty ratio of regulating first insulated gate bipolar transistor IGBT 1 can speed governing; If require at full speed, the 4th A.C. contactor KM4 closure then, first insulated gate bipolar transistor IGBT 1, second insulated gate bipolar transistor IGBT 2 turn-off.
Transfer load: threephase stator feeds the positive phase sequence three-phase electricity, and machine operation is in drawing inverted status, the first A.C. contactor closure, second A.C. contactor, the disconnection of the 3rd A.C. contactor; 1 copped wave of first insulated gate bipolar transistor IGBT, 2 conductings of second insulated gate bipolar transistor IGBT, the duty ratio of regulating first insulated gate bipolar transistor IGBT 1 can speed governing.
2, underloading
Promote load: threephase stator feeds the positive phase sequence three-phase electricity, and machine operation is in the forward motoring condition, the first A.C. contactor KM1 closure, and the second A.C. contactor KM2, the 3rd A.C. contactor KM3 disconnect; First insulated gate bipolar transistor IGBT 1 turn-offs, 2 copped waves of second insulated gate bipolar transistor IGBT, and the duty ratio of regulating second insulated gate bipolar transistor IGBT 2 can speed governing; When transferring underloading, push down and drawing counter-rotating control to implement, if the duty ratio of second igbt is zero still can not transfer, threephase stator feeds the negative-phase sequence three-phase electricity, machine operation is in reverse motoring condition, the second A.C. contactor closure, and first A.C. contactor, the 3rd A.C. contactor disconnect; The first igbt copped wave, the second igbt conducting, the duty ratio of regulating first igbt realizes speed governing.
Require rotating speed lower during the general underloading of crane, realize this requirement, in the governing system that adopts single tube copped wave, can only increase the crosstalk resistance of rotor loop institute, this will make the resistance volume increase, slip loss increases, when adopting the governing system of two-tube copped wave, first insulated gate bipolar transistor IGBT 1 turn-offs, 2 copped waves of second insulated gate bipolar transistor IGBT, in fact be exactly that the crosstalk resistance of rotor loop institute is alternately switched between finite value and infinity, realize that underloading low speed reduces the requirement of loss.
3, heavy duty
Heavy duty is transferred: the 3rd A.C. contactor KM3 closure, and the first A.C. contactor KM1, the second A.C. contactor KM2 disconnect; The first igbt copped wave, the second igbt conducting, the duty ratio of regulating first igbt realizes speed governing, if the duty ratio of first igbt is zero shutoff, carry out the transition to the duty ratio of regulating second igbt; If require lowest speed, the 4th A.C. contactor KM4 closure then, first insulated gate bipolar transistor IGBT 1, second insulated gate bipolar transistor IGBT 2 turn-off.
4, transfer at full speed
If require energy-conservation full speed to transfer, threephase stator feeds the negative-phase sequence three-phase electricity, and machine operation is in reverse feedback generating state, the second A.C. contactor closure, and first A.C. contactor disconnects, the 3rd A.C. contactor disconnects the 4th A.C. contactor closure.
General rotor chopping regulating speed system, what adopt when heavy duty is transferred is the mode of drawing counter-rotating, the motor stator end feeds positive-phase-sequence current, the big resistance of serial connection in the rotor loop, because load torque is very big, the dragging motor counter-rotating, revolutional slip is greater than 1, therefore the potential energy of load changes into the mechanical output of motor, and the same slip power that all converts to electromagnetic power, and slip loss is very big; When adopting dynamic braking, the direction of transfer of power is constant, it is the minimizing of the mechanical output imported on the motor reel from the load potential energy, mechanical output is that the electrical power post consumption is in rotor loop in the motor internal conversion, but under this operational mode, absolute value is compared with drawing the counter-rotating operation less than 1 constant during revolutional slip, when the lowering velocity of load torque and requirement was identical, slip loss obviously reduced.
The enforcement of running status of the present utility model is implemented by a control board based on DSP or other microprocessors, detectable motor speed, turn to, control each contactor break-make, export first, second IGBT switching signal, the control duty ratio, adjusting seals in the equivalent resistance of rotor loop, reaches the purpose of speed governing, and controls corresponding fast.
In sum, it only is preferred embodiment of the present utility model, be not to be used for limiting the scope that the utility model is implemented, all equalizations of doing according to the described shape of the utility model claim scope, structure, feature and spirit change and modify, and all should be included in the claim scope of the present utility model.
Claims (2)
1. a novel lifting winding motors rotor chopping regulating speed system comprises motor stator lateral circuit and motor rotor lateral circuit, it is characterized in that,
Comprise in the motor stator lateral circuit: the transformer, a single phase alternating current (A.C.) contactor that is connected to this former limit of transformer and the single-phase rectification bridge that is connected to this transformer secondary that are connected to the wherein two-phase alternating current pressure of three-phase alternating voltage;
Comprise in the motor rotor lateral circuit: be connected to the three-phase commutation bridge, first igbt, second igbt, diode, filter capacitor of three-phase alternating voltage and fixing speed adjusting resistance, be connected to the two ends of this three-phase commutation bridge after first igbt and the series connection of second igbt, the diode back of connecting with fixing speed adjusting resistance is in parallel with first igbt, one end of filter capacitor is connected with the negative electrode of diode, and the other end is connected with the emitter of second igbt.
2. novel lifting winding motors rotor chopping regulating speed according to claim 1 system is characterized in that, also comprises the A.C. contactors that a plurality of wherein two-phase alternating currents that are connected to three-phase alternating voltage are pressed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201111592U CN202094840U (en) | 2011-04-15 | 2011-04-15 | Novel rotor chopping speed regulating system of hoisting wound motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201111592U CN202094840U (en) | 2011-04-15 | 2011-04-15 | Novel rotor chopping speed regulating system of hoisting wound motor |
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| Publication Number | Publication Date |
|---|---|
| CN202094840U true CN202094840U (en) | 2011-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201111592U Expired - Lifetime CN202094840U (en) | 2011-04-15 | 2011-04-15 | Novel rotor chopping speed regulating system of hoisting wound motor |
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| Country | Link |
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| CN (1) | CN202094840U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170264A (en) * | 2011-04-15 | 2011-08-31 | 苏州新广济工贸有限公司 | Novel crane wound motor rotor chopping speed regulation system and method |
-
2011
- 2011-04-15 CN CN2011201111592U patent/CN202094840U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170264A (en) * | 2011-04-15 | 2011-08-31 | 苏州新广济工贸有限公司 | Novel crane wound motor rotor chopping speed regulation system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111228 Effective date of abandoning: 20150617 |
|
| RGAV | Abandon patent right to avoid regrant |